6alpha-amino-17-loweralkylenedioxy-3, 5-cycloandrostanes



United States Patent Ofilice 3,l89,6% Patented June 15, 1965 3,189,606 Ga-AIVHNQ-U-LOWERALKYLENEDIGXY- 3,5-CYCLOANDROSTAYES John S. Tadanier, Chicago, and John Wayne Cole, Deerfield, llh, assignors to Abbott Laboratories, North Chicago, 111., a corporation of Illinois No Drawing. Filed July 29, 1963, Ser. No. 298,459 9 Claims. (Cl. 260-23955) This application is a continuation-in-part of our earlier filed application, Serial No. 180,357, filed on March 16, 1962, now abandoned.

The present invention is concerned with new steroids. More particularly, it relates to 6-aminoandrostanes and the processes for their preparation.

The new compounds of the present invention are those of the formula:

Pi or wherein R is an alkylene radical in which the valence bonds are separated by 2 or 3 carbon atoms and wherein R represents hydrogen or acyl. The amino group or the substituted amino group in the 6-position of the steroid molecule can be of the uor it-configuration.

The compounds of the present invention are pharmaceutically useful as endocrine agents, causing a favorable shift in anabolic/ androgenic response as measured by the ratio or levator ani growth to prostate growth in warmblooded animals. The new compounds are also valuable as chemical intermediates in the synthesis of other hormonal agents, e.g., the corresponding steroids with a 17-oxo group which are also hormonally active.

The present invention is also directed to a new group of steroid intermediates, mainly the 6-oximino-l7-ethylenedioxy-3a,5a-cycloandrostane and the 6-oximino-l7-propylenedioxy-3a,5a-cycloandrostane. These intermediates are precursors in the preparation of the 6a-amino-17-alkylenedioxy-3a,5a-cycloandrostanes and the corresponding N-acyl substituted derivatives thereof which are included in the above defined class of new steroids.

In the preparation of the compounds of Formula A wherein the 6-aminoor 6-acylaminogroup is in the a-position, a 6-oxo-l7-alkylenedioxy-3a,5u-cycloandrostane is converted to the corresponding oxime with hydroxylamine under conditions which permit the retention of the sensitive ketal group in the l7-position. Reduction of the 6-oximino-3a,'5 x-cycloandrostan-l7-one ketals leads to de-amino-l7-alkylenedioxy 301,50: cycloanclrostanes which can be acylated to the corresponding 6a-acylamino analogues.

For the preparation of the steroids of Formula A Wherein the o-amino group is in the fl-position, a sultonic ester of a 3B-hydroxy-17-alkylenedioxyandrost-5-ene is used as starting material. By treating this material with ammonia, a 6,8-amino-3a,5a-cycloandrostan-17-one ketal is obtained. This amine can be acylated by standard procedures to yield the corresponding 6,8-acylamino-3eja-cycloandrostan-l7-one ketal.

The above procedures for making compounds of Formula A teach a general method of forming a 6-amiuo-3,5 cyclosteroid structure while retaining in the 17-position a useful functional group which can be subsequently converted to a keto group or which can be retained during the acylation step whereby a 6,8-acylamino steroid is obtained.

The present invention is more specifically explained by reference to the following examples which are given here as illustrations only and are not meant to limit the present invention in any manner.

EXAMPLE 1 6-0ximino-1 7-ethy lenedz'oxy-ja,5a-cycloandrostane A solution prepared from 4.8 grams of 17-ethylene- (llOXY-3cc,SolrCYClOflIIdIOSl3I1-6-Ofl6, 5.0 grams of hydroxylamine hydrochloride, and 200 ml. of pyridine, is heated on a steam bath for 3 hours. After cooling, the mixture is diluted with 1.2 liters of water and extracted with ether. The ether extract is washed with water and dried over magnesium sulfate. The solvent is evaporated and the residue is crystallized from aqueous ethanol to obtain crystals of -oximino-17-ethylenedioxy-3 a,5a-cycloandrostane. The crystals are separated by filtration, washed with aqueous ethanol, and dried, to yield 4.18 grams of this new intermediate, melting at 1826 C. A portion of this product is recrystallized to obtain an analytical sample, melting at l86-7 C., of which the obtained analytical values correspond with the calculated values for 6-oximino-17-ethylenedioxy-3a,5ct-cycloandrostane, with the empirical formula C H O N.

EXAMPLE 2 6 a-amz'noJ 7-ethylenedi0xy-3 m,5cz-cycl0andr0stane A solution of 4.1 grams of o-oximino-l7-ethylenedioxy- 3a,5u-cycloandrostane in 400 ml. of anhydrous ethanol is heated under reflux while 36 grams of metallic sodium is added portionwise in the course of 90 minutes. After a further minutes of refluxing, the warm reaction mixture is diluted with 200 ml. of anhydrous ethanol and filtered through a sintered glass funnel. The filtrate is cooled by the addition of ice and 2 liters of cold water and is subsequently extracted with ether. The ether extract is washed with water and then dried over magnesium sulfate. The ether is evaporated, leaving 4.33 grams of a viscous, paleyellow oil. This oil is dissolved in ml. of ether, to which solution 2.5 ml. of glacial acetic acid is added and the resulting solution is agitated until homogeneous. The solution is then diluted to 200 ml. with water and extracted twice with ZGO-ml. portions of ether. The ether solutions are washed in series with two ISO-ml. portions of water which are added to the original aqueous extract.

The resulting aqueous solution containing the acetic acid salt of the amine is treated with 200 ml. of 5% sodium hydroxide solution and extracted with ether. The ether solution is washed with water and dried over magnesium The ether is evaporated, leaving 2.83 grams of sulfate.

V 6pz-aminol 7-ethylenedioxy-3 a,5 a-cycloandrostane identi areaeee fied by the infrared spectrum and characterized by conversion to other derivatives. a

' *EMMPLE 3 6 ix-acetamz'do-l 7 -ez1'zy lenedio'xy-i 04,5 a-cycloaudrostane A solution prepared from 1.6 grams of 6a-amino-17-' yield 6a acetamido-l7-ethylenedioXy-3a,5a-cycloandro-.

stane. which separates from the crystallization medium as a white gel which converts to a finely divided white solid on filtration. After drying, the product melts at 193-7 C.

The product is identified by its infrared absorption pattern a and elemental analysis which is in accord with piricalfo rmula C H O N, V ,7 w

' EXAMPLE 4 the em- 7 6u-amino-17-ethylenedioxy-3 (1,5 aQcycloandrQStane, prepared as described in Example 2, is stirred at room temperature with a mixture of 5% aqueous sodium hydroxide,

benzene, and excess nitrobenzoyl chloride. The benzene solution is separated, washed with water and dried over anhydrous magnesium sulfate. The solvent is evaporated 'and the residue is recrystallized from ethanol/water to yield pure 6a-p-nitrobenzamido=l7-ethylenedioxy-3a,5a-

.cycloandrostane. The elemental analysis is in accord with the'empirical formula C H O N EXAMPLE 5 ot-propz'orzdniido-l 7-ethylenedioxy- V :,5 ot-cycloandrostane When the procedure of Example 3 is repeated, but using 14 ml.*of propionic acid anhydride in place of 5 'ml. of acetic anhydride, the product obtained is 6o -propionarnidol7-ethylenedioxy-3ixja-cycloandrostane, which is identified by infrared absorption spectrum and the elemental analysis which corresponds to the empirical formula C24H37O3NL V i 7 EXAMPLE 6 6-0xz'm in0] 7 -pr0py lenedi0xy-3 a,5 a-cycloandrostane 3 3-hydroxy-17-(1,3-propylenedioxy)-androst'- 5 ene is 7 prepared by treating BB-hydrOXyandroSt-S-en-17-one with 1,3-propylene glycol in the presence of a catalytic amount of p-toluenesulfonic acid according to the general procedure for making propylenedioxy steroids which is described in U.S. 2,302,636. This product is converted to 3B p toluenesulfonoxy l7 7 (1,3 propylenedioxy): androst-S-ene by treatment with p-toluenesulfonyl chloride in pyridine. The p-toluenesulfonate is converted by hydrolysis to the 6fi-hydroxy compound which is oxidized to 17 (1,3 propylenedioxy) 3x,5ot cycloandrostan- 6-one according to the procedure described in'Bull. Soc. Chim. France, 1950, pp. 298-9 The analytical values of this ketone ,are in accord with the empirical formula CH 32 a The 17 (1,3 propylenedioxy) 3a.,5a cycloandrostan-6-one is converted by the procedure of Example 1 into 6-oxirnino-l7- 1 ,S-propylenedioxy -3 'aja-cycloandrostane. The analytical results are in accord with the empiricalformula C H O N. a

. l EXAMPLE 7 f p 6a-amz'n0-1 7- (1 ,3-pr0py l'eriedz'oxy 3m,5a-cycl0andr0stane A solution of '4 grams of the 6-oximino-17-propylene dioxy-3a,5ce.-cycloandrostane of Example 6 in 400 ml. of anhydrous ethanol is reduced by portionwise addition'of 36 grams of sodium. The reaction mixture is worked up according to the process described in Example 2, to. yield 6e-arnino-17-propylenedioxy 36!,50L cycloandrostane, of

which the analytical values correspond to those for the empirical formula C H O N. 1

This amine is converted by theprocedures of Examples 7 3, 4 and 5-into thefollowing new compounds; I

6a-acetamido-17-propylenedioxy-3u,5a-cycloandrostane,

6a-p-nitrobenzamido-17 propylenedioxy-3 06,500 cycloandrostane,- i

wpropionamidod7-propylenediox -3ot,5ot- 1 cycloandrostane,

respectively. p

7 EXAMPLE 8 r 6 ,B-amino-l 7-ethylenedioxy-3 major ddoandrostane I 7 A mixture of l 5 grams of 3,8-p-toluenesulfonoxy-17 ethylenedioxyandrost-S-ene described in Bull; Soc. Chim.

France, 1960, page 298, and ml; of liquid ammonia is h heated in a pressure vessel'at 100 for l51hours. mixture is cooled and the excess ammonia is allowed to evaporate. The residue is shaken with 300 ml. of ether and 200 ml. of 5%aqueous sodium hydroxide. The

aqueous phase is-separated and extracted with 200 ml. of

. ether.

sulfate.

an oil.; 7 V

This crude product is; dissolved in a' solutionprepared from 30ml. of methanol and 3 ml. of glacial acetic acid.

The resulting solution is shaken with 300ml. of ether and 200 I111. of water. The aqueous layer is separated and extracted with 200 ml. of ether. The ether solutions are washed in series with three 100-ml. portions of water and the aqueous washings are addedto the original aqueous extract.

The resulting aqueous ,The ether solutions are washed separately with water, combined. and dried over anhydrous magnesium The solvent is evaporated, leaving 9.4 grams of solution containing the water soluble mixture of acetic acid salts is shaken With300 ml.

of'ether and 200 ml. of 5% aqueous sodium hydroxide. The aqueous phase is separated and. the ether solution is washed with water'and .dried over magnesium TsulfateJ The ether is evaporated leaving 6.9 grams of acrystalline residue. Recrystallization of this material from pen tane yields a first crop of 2.4 grams of 613earnino-l7- ethylenedioxy-3 u,5u-cycloandrostane melting at 100-110 7 Further rccrystallization of the product from'pentane yields the pure amine melting at l()8l 1() which has an [1111 of 18 as a 1% solution in chloroform; The analytical values are in agreement With "the empirical 'fOI'mu1a-C21H3302N. V i V 7V V The motherliquor from the abovecrystallization is further processed to obtain additional 6,8 -amino-17- ethylenedioxy-3a,5ot-cycloandrostane after removal of the lSOIl'lBI'iCGccand 3,8-amino-17-ethylenedioxyandrost-- The B/Seamine is netic resonance spectra.

dioxy-3a,5u-cycloandrostane from Example 8 in 25 ml. of

pyridine is added 8 ml. of acetic anhydride. iThe result-f The acetic acid salt of the Zia-amine is sepaf EXAMPLE 10 6 fi-p-nitrobenzamido-I 7-ethylenedi0xy- (or propylenedioxy -3a,5u-cycloandrostane) By following the procedure described in Example 4 but using 65 amino 17-ethylenedioxy-3 a,5u-cycloandrostane as the starting material, 6,Bp-nitrobenzamido l7-ethylenedioxy-3 11,5 a-cycloandrostane of empirical formula C28H3305N2 is obtained.

The same procedure produces 6fi-p-nitrobenz'amide- 17-(1,2- or 1,3-propylenedioxy)-3a,5m-cycloandrostane when the corresponding acetals are used as starting materials.

It will be apparent to those skilled in the art that the procedures of this invention are applicable to steroids having various ketal structures at the 17-position. It is known that the following glycols may be used for preparing such ketal structures:

Ethylene glycol (giving ethylenedioxy structures as described in Example 1) 1,2-propylene glycol (see J. Med. Pharm. Chem. 133,

1,3-propylene glycol (as in Example 6 above) 2,2-dimethylpropane-1,3-diol (see U.S. 2,960,502)

2,3-butanediol (see Can. J. Technology 29, 243, 19 5.1)

The ketal structures useful as endocrine agents are the 6-amino steroids having in the 17-position an alkylenedioxy group of the structure O(CH O wherein n is 2 or 3 and wherein the alkylene hydrogens may be replaced by methyl groups.

From the free 6a-amino or 6p-amino steroids described above, carrying in the 17-position the alkylenedioxy structure, the amino group may be substituted in the manner shown above by a great variety of acyl groups. Among the acyl groups suitable as substituents R of Formula A are acetyl, propionyl, 3-carboxypropionyl, butyryl, hexanoyl, benzoyl, p-nitrobenzoyl, p-methoxybenzoyl, 3,4-dimethoxybenzoyl, 3,4,5-trimethoxybenzoyl, cyclopentanoyl, p-acetylaminobenzoyl, various halobenzoyls, p-toluoyl, cyclohexanoyl, phenylacetyl, alkylaminophenyl, isobutyryl, etc.

In other words, the substituent R' in Formula A may be hydrogen or R"CO wherein R" is loweralkyl, carboxyalkyl, benzyl, phenyl and phenyl carrying one or more monovalent substituents from the class of halogen, nitro, loweralkyl, loweralkoxy, loweralkoylamino and loweralkylamino.

Others may practice the invention in any of the numerous ways which will be suggested to one skilled in the art by the present disclosure. All such practice of the invention is considered a part hereof provided it falls within the scope of the appended claims.

6 We claim: 1. A steroid of the formula A C I Q wherein R is selected from the group consisting of hydrogen and lower fatty acid acyl, and wherein R is an alkylcne group in which the valence bonds are separated by 2-3 carbon atoms.

2. A steroid of the formula NHR wherein R is selected from the group consisting of hydrogen and lower fatty acid acyl.

3. '6u-amino-17-ethylenedioxy-3 a,5a-cycloandrostane. 4. 6,8-amino-l7-ethylenedioxy-3 a,5a-cycloandrostane. 5. 6a acetamido 17 ethylenedioxy- 304,50; cycloandrostane.

6. 6,5 acetamido-17 ethylenedioxy 30:,50: cycloandrostane.

7. 6-oximino-17-ethylenedioxy3a,5a-cycloandrostane. =8. The process comprising the steps of heating a 17-alkylenedioxy 3a,5aecycloandrostan-6-one 'With an excess of hydroxylarnine until the 6-oximinol7 alkylenedioxy-3a,-5u cyc1oandrostane is formed, separating said 6-oximino-compound, reducing said 6-oximino-compound in an alcoholic solution in the presence of an alkali metal, and isolating the formed 6a-amino-17-alky1enedioxy-3a,5a-

cycloandrostane from the reaction mixture. 9. The process of claim 8 wherein said 17-alkylenedioxy-3u,5a-cycloandrostan-6-one is 17-ethylenedioxy-3a, 5a-cycloandrostan-6-one.

LEWIS GO'ITS, Primary Examiner. 

1. A STEROID OF THE FORMULA 